Pull up bar



FIG. 1 is a front-top-left perspective view of a pull up bar, showing my new design;

FIG. 2 is a back-top-left perspective view thereof;

FIG. 3 is a front elevational view thereof, with the supports folded;

FIG. 4 is a front elevational view thereof; with the supports extended;

FIG. 5 is a rear elevational view thereof,

FIG. 6 is a left elevational view thereof;

FIG. 7 is a right elevational view thereof;

FIG. 8 is a top plan view thereof; and,

FIG. 9 is a bottom plan view thereof.

The broken lines showing the mounting plates in FIGS. 1-4 and FIGS. 6-9 are included for the purpose of showing environmental structure and form no part of the claimed design. 

CLAIM The ornamental design for a pull up bar, as shown and described. 